Homework Help: Chemistry

Posted by Danielle on Wednesday, April 4, 2012 at 10:11pm.

A substance (CD) decomposes into C and D
At the temperature of the experiment, 15.0% of CD is decomposed when equilibrium is established.

a) if the initial concentration of CD is 0.200mol/L, what are the equilibrium concentrations of CD, C and D?

I got 0.17 for CD and I got 0.015 for C and D.

b) What is K for the reaction at this temperature?

I need help with b please :)

Chemistry - DrBob222, Wednesday, April 4, 2012 at 10:38pm
Thank you for posting your work. You also need help with part a.
If CD ==> C + D, then for every 1 mol CD that decomposes, you obtain 1 mol D and 1 mol C; therefore, 0.2 x 0.15 = 0.03 and the (C) = (D) = 0.03. 0.17 is correct for CD.
2.
Keq = (C)(D)/(CD) = (0.03)(o.03)/(0.17) = ?
Chemistry - Danielle, Wednesday, April 4, 2012 at 10:42pm
Oh now it makes sense. Thank you so much DrBob222 :)

Answer this Question

Related Questions

Chemistry`` - A substance (CD) decomposes into C and D. CD(g) &#...
math - On a pool table, where along the potion of CD of the railing should you ...
phy - How much work is done by the motor in a CD player to make a CD spin, ...
Chemistry - Calculate the value of the solubility product (Ksp) for CdS given ...
college chemistry - Cadmium sulfide (CdS) is used in some semiconductor ...
physics - A CD has a mass of 17.4 g and a radius of 6.01 cm. When inserted into ...
physics - A CD has a mass of 17.4 g and a radius of 6.01 cm. When inserted into ...
chemistry - When heated, CaCO3 decomposes as follows: CaCO3 (s) = CO2 (g) +CaO (...
Physics - A CD has a mass of 17.0 g and a radius of 5.98 cm. When inserted ...
Physics - A compact disc spins at 2.8 revolutions per second. An ant is walking ...

For Further Reading

First Name:
School Subject:
Answer: